Faith
is knowing precisely what would happen. Sure, Jesus knew He was different - but in the same way I know
I'm different: that I'm able to have that kind of faith.
I also have to point out that some of your assumptions aren't completely accurate:
Now, let's set that in some context that will make sense out of it, because in that sense, at least for most people in the first century and throughout the ancient period, and in fact throughout most of the Middle Ages, miracles really do happen. Magical powers were real. But this is not to say that they were unintelligible or irrational. There was an explanation, an understanding of the order of the world that allowed for the miraculous to happen.
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Magic, miracles and the gospel
There were many such "irregular" people, and Jesus was no more irregular than most of them... compared to his contemporary, John the Baptist, Jesus was a very ordinary guy. He wasn't ascetic, he didn't have a particularly theological education, and he didn't perform any great deeds.
Jesus had his own cross to bear, as have each of us. His emotional burdens were just as heavy as about any of us can bear. Couple that with the knowledge that you will be delivered into the hands of the two most powerful factions in existence, as a criminal, and it was pretty harsh. But Jesus followed that path willingly. As I said before, the only reason He had to presume that He would be resurrected was His faith that God would see justice done, and he was the means of it - He could not resurrect himself, as a human being, and neither can we.
Whatever we lack in faith or perfection, Jesus supplied. That is why our only certainty lies with Him. But His father has become our Father, and his faith, our faith. That's why I said it's no different.